Finishing off 'query2*' scripts

Database/hosts_list.tpl, Database/hosts_showcount.sqlite.sql: examples
    of using 'query2tt2'

Database/query2csv, Database/query2json, Database/query2tt2: minor bug
    fix relating to '-dbarg=ARG' option

Database/hosts_showcount.sqlite.sql

@@ -0,0 +1,15 @@
+--
+-- Query for use with 'query2tt2' to generate a list of hosts who contributed
+-- shows in a particular year. Designed to be used with the 'hosts_list.tpl'
+-- template.
+-- The two '?' placeholders in the query are to be filled with 'YYYY-01-01'
+-- for the start of the year and 'YYYY-12-31'. The values can be passed using
+-- the '-dbargs' option to 'query2tt2'.
+--
+SELECT DISTINCT
+    printf('%04d',h.hostid) AS hostid, h.host AS hostname
+FROM eps e
+JOIN hosts h ON e.hostid = h.hostid
+WHERE e.date BETWEEN ? AND ?
+AND title != 'Reserved'
+ORDER BY h.host